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  • 1
    Electronic Resource
    Electronic Resource
    Temperature dependence of nuclear magnetic resonance absorption in coal (1962)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 6 (1962), S. 94-97 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The proton magnetic resonance in the vitrain of Yūbari caking coal and its residue of pyridine extraction has been studied over the range 90 to 423°K. At lower temperature the absorption line consists of a broad component. At higher temperature this component begins to decrease rapidly in the line width and resolves into two components. This rapid narrowing of the absorption line width suggests a glass transition attributed to the molecular motion in coal. The variation of the second moment of the absorption line with temperature reflects the line width variation. From these results some information on the molecular motion and arrangement in coal have been obtained.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1962.070061910
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  • 2
    Electronic Resource
    Electronic Resource
    Die Volumenänderung von Gußeisen beim Erstarren, nebst einer Kritik des Doppeldiagramms des Systemes Eisen-Kohlenstoff (1926)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 154 (1926), S. 238-252 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19261540123
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  • 3
    Electronic Resource
    Electronic Resource
    The differential refractive index increments of statistical styrene/acrylonitrile/methyl methacrylate terpolymers (1972)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 25 (1972), S. 163-169 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Das Brechungsindexinkrement von acht verschieden zusammengesetzten Terpolymeren aus Styrol, Acrylnitril und Methylmethacrylat wurde in Dimethylfoirmamid und in Butanon bestimmt. Aus der infrarotspektroskopisch ermittelten Zusammensetzung der Copolymeren und den Brechungsinkrementen der Homopolymeren wurden die Brechungsinkremente der Terpolymeren berechnet. Das ptrrtielle azeotrope Terpolymere besitzt ein konstantes Brechungsinkrement während der Terpolymerisation, während die aus anderen Monomermischungen erhaltenen Werte sich mit dem Umsatz ändern.
    Notes: The differential refractive index increment was measured for statistical styrene/acrylonitrile/methyl methacrylate terpolymers of eight different compositions in dimethylformamide and in butanone. With the terpolymer composition obtained from infrared absorption and the differential refractive index increments of the homopolymers, the differential refractive index increments of terpolymers are calculated. The partial azeotropic terpolymer gives a constant value in the course of terpolymerization. The differential refractive index increment of a terpolymer synthesized from other monomer feed than the azeotropic composition changes with conversion.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1972.050250115
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  • 4
    Electronic Resource
    Electronic Resource
    The molecular weight dependence of depolarization of scattered light from styrene oligomers in solutions (1979)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 82 (1979), S. 55-62 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Die Molekulargewichtsabhängigkeit der Depolarisierung wurde für Polystyrol- und Oligostyrollösungen in Butanon gemessen. Drei wesentliche Ergebnisse wurden erhalten: (1)Die Depolarisationen ϱu der Polystyrol- und Oligostyrollösungen in Butanon zeigen ein Minimum bei einer charakteristischen Konzentration im Gegensatz zu einer Styrollösung in Butanon.(2)Das Depolarisationsminimum fällt mit steigendem Polymerisationsgrad des Oligostyrols und erreicht einen konstanten Wert für Polystyrollösungen von ϱu = 0,0148. In den Oligostyrollösungen stimmt die Depolarisation mit einer theoretischen Berechnung überein, während in Polystyrollösungen eine Beeinflussung durch intra- und intermolekulare Wechselwirkung zu beobachten ist.(3)Die der minimalen Depolarisation zuzuordnende Konzentration C* fällt mit P-½ für Polystyrollösungen und fällt mit P- 1 für Oligostyrollösungen. Dies hängt mit der von einer Gauß-Verteilung abweichenden Verteilung der Oligomersegmente zusammen.
    Notes: The molecular weight dependence of depolarization was measured for polystyrene and styrene oligomer solutions in butanone. Three evident results were obtained: (i)the depolarizations ϱu of polystyrene and styrene oligomer solutions in butanone show a minimum value at a characteristic concentration inspite of that the depolarization of a styrene monomer mixture with butanone shows no minimum value.(ii)the minimum value of depolarization ϱu* decreases with the degree of polymerization, P, for styrene oligomer solutions and reaches a constant value for polystyrene solutions, that is ϱu* = 0.0148. In oligomer solutions the depolarization conforms to the theoretical equation, but in polystyrene solutions the depolarization is affected by both intra-and intermolecular interferences.(iii)the characteristic concentration C*, corresponding to the minimum depolarization ϱu*, decreases with P-1/2 for polystyrene solutions and decreases with P-1 for styrene oligomer solutions. This fact is concerned with the deviation from a Gaussian distribution of oligomer segments.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1979.050820105
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  • 5
    Electronic Resource
    Electronic Resource
    The relationship between the molecular weight and the critical miscibility composition of a solvent-nonsolvent-terpolymer system (1975)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 48 (1975), S. 175-183 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Eine theoretische Gleichung zur Beschreibung der mittels Lichtsteruung gemessenen Abhängigkeit des scheinbaren Molekulargewichts vom Lösungsmittel wurde im Hinblick auf die Heterogenität der Zusammensetzung abgeleitet. Terpolymere mit einem partiellen Azeotrop wurden aus Styrol, Acrylnitril und Methylmethacrylat hergestellt. Die Molenbrüche betrugen in der angegebenen Reihenfolge 0,55; 0, 16; 0,29. Das mittels Lichtstreuung bestimmte Molekulargewicht erwies sich als vom eingesetzten Lösungsmittel unabhängig. Daraus wurde auf eine homogene Zusammensetzung des Terpolymeren geschlossen. Das Verhältnis zwischen dem Molekulargewicht des Terpolymeren und dem Volumenbruch des Fällungsmittels γ in dem Lösungsmittelgemisch am Fällungspunkt in einem Butanon-Methanol-Terpolymer-System folgte, wie experimentelle Untersuchungen zeigten, der Gleichung worin γ0 und b′ Konstanten bedeuten. Zwischen dem Molekulargewicht und der Viskositatszahl [η] des Terpolymeren gelten die folgenden Beziehungen bei 35°C: und
    Notes: A theoretical equation for the dependence of the apparent molecular weight measured by light scattering on the solvent used has been derived with regard to the composition heterogeneity. Terpolymers corresponding to a partial azeotrope were synthesized from styrene, acrylonitrile, and methyl methacrylate with mole fractions of 0.55, 0.16, and 0.29, respectively. The molecular weight measured by light scattering was found to be independent of the solvent used. Therefore the terpolymer was concluded to be apparently homogeneous in composition. The relationship between the molecular weight M of the terpolymer and the volume fraction of the nonsolvent γ in the solvent mixture at the precipitation point in a butanone-methanol-terpolymer system was experimentally proved to follow the equation where γ0 and b′ are constants. Between the molecular weight and the limiting viscosity number [η] of the terpolymer the following relationships are valid at 35°C: and
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1975.050480111
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  • 6
    Electronic Resource
    Electronic Resource
    Specific volume of molten polychlorotrifluoroethylene (1956)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 20 (1956), S. 587-590 
    Details
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1956.120209621
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  • 7
    Electronic Resource
    Electronic Resource
    Specific volume of molten poly-(chlorotrifluoroethylene) (1958)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 28 (1958), S. 232-232 
    Details
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1958.1202811625
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  • 8
    Electronic Resource
    Electronic Resource
    Biologically active glycosides from asteroidea, XXVI. Stereochemistry of the four diastereomers of ceramide and ceramide lactoside (1991)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1991 (1991), S. 349-356 
    Details
    ISSN: 0170-2041
    Keywords: Ceramide, synthesis of diastereomers ; Ceramide lactoside, synthesis of diastereomers ; Glycosphingolipids ; Carbohydrates ; Starfishes ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The diastereomeric ceramides, (2S,3S,4R)-, (2S,3S,4S)-, (2S,3R,4S)-, and (2S,3R,4R)-2-[(2R)-2-hydroxytetracosanoylamino]-1,3,4-hexadecanetriols 5-8 and the corresponding ceramide lactosides 1-4 have been synthesized. Compound 1 is almost identical with the natural specimen, acanthalactoside A. The physical data of these diastereomeric compounds are most useful to determine the stereochemistry of ceramides and ceramide lactosides, either isolated from natural sources or obtained by partial hydrolysis of gangliosides.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.199119910161
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  • 9
    Electronic Resource
    Electronic Resource
    Biologically Active Glycosides from Asteroidea, XXX. - Synthesis of an Optically Active Ceramide of GM1-Type Ganglioside from (+)-diethyl L-Tartrate (1993)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1993 (1993), S. 55-60 
    Details
    ISSN: 0170-2041
    Keywords: (+)-Diethyl L-tartrate ; Ceramide ; Sphingolipid ; Enantioselective synthesis ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A short total synthesis of the ceramide (2S,3R,4E)-2-(octadecanoylamino)-4-octadecene-1,3-diol (1) is reported, using (+)-diethyl L-tartrate (2) as the optically active starting material.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.199319930110
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  • 10
    Electronic Resource
    Electronic Resource
    Biologically active glycosides from asteroidea, XXVII. Stereochemistry of the C-17 side chain of 26-homothornasterol B: Novel triethylaluminum-promoted rearrangement and alkylation of epoxy alcohols (1991)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1991 (1991), S. 595-598 
    Details
    ISSN: 0170-2041
    Keywords: 5α-Cholest-9(II)-en-23-one, (20S,24S,25R)-3β-6α-diacetoxy-20-hydroxy-24-methyl-26-homo- ; 26-Homothornasterol B ; Epoxy alcohol ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The absolute configuration of 3,6-di-O-acetyl-26-homothornasterol B (3) obtained previously besides the 3,6-di-O-acetyl derivative (2) of (20S,24S)-24-ethylthornasterol A by aldol reaction2a) of the mixture of (3S)-3-ethyl-4-methyl-2-(trimethylsiloxy)-1-pentene (7) and 3,4-dimethyl-2-(trimethylsiloxy)-1-hexene (8) with (+)-diacetylasterone (1) has been determined by X-ray structural analysis as (20S,24S,25R)-3β,6α-diacetoxy-20-hydroxy-24-methyl-26-homo-5α-cholest-9(11)-en-23-one. On the basis of these results a novel rearrangement and alkylation of the epoxy alcohols 6, 9, 13, and 15 with triethylaluminium have been discovered and investigated. The reaction occurs when the C-4 position adjacent to the epoxide ring is congested.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.1991199101108
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